Powertrain, generic (extended)

P2094 "B" Camshaft Position Actuator Control Circuit Low (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2094 belongs to the fourth phaser valve of a twin-phaser V engine: actuator B, the exhaust camshaft, on bank 2. It is therefore absent on single-cam pushrod V8s and on inline engines. On GM's 3.6 L LFX the high-side output is checked for a ground short while on and treated as Type A after 20 out of 25 samples of 250 ms (19OBDG03B). The low-side GM controller of table 23OBDG07 detects the short to ground while off and reacts within 0.2 s; the lamp follows on the second trip. Ford's 2014 petrol list carries P2094 for the continuous monitor only. CARB requires output components of the valve timing system to be checked for circuit faults. An open circuit on this valve is P0023, wrong exhaust timing on bank 2 P0024 or P0025.

Likely causes

Bank 2 exhaust valve wire shorted to ground
Shorted coil in the bank 2 exhaust oil control valve
Insulation damaged by heat near the exhaust manifold

Symptoms

  • Engine warning lamp on
  • Slight loss of efficiency, higher part-load emissions

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–400
Time0.4–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oil control valve exhaust bank2oil control valve wiringengine control module

Related codes

P2095P2090P2092P0023P0024P0025

References: gsi.ext.gm.com, gsi.ext.gm.com, law.cornell.edu.